Timer



BEST AVAELAQLE GDP:

Aug. 10 192a 1,595,532-

-H. H. WANPERS TIIBR Filed May 1921 Patented Aug. 10, 1926.

are; mnesia copy UNITED STATES PATENT ()FFICEL' HANS H. WANIDEBS OF BOSTON, MASSACHUSETTS,-ASSIGNOB TO NORTHERN INDUS- TRIAL CHEMICAL COMPANY, 93 BOSTON, MASSACHUSETTS, .A CORIOBA'I'ION OF MASSACHUSETTS.

- Application fled Kay 8,

This invention 7 comprises, an insulating casing or headflto" wluch th usual "timing control is connectedlthrtiug'h zi crank arm fixed thereto, and meensby which this arm is secured"without dzinger of metalfparts Ig'oljeeting through'the eiisinggvvhich might A. further" feet irel 'relates'fto the manner of mounting the, movable e'ontirctisho'e lectuated by the timing: shaft fithitf end play of the shaft has 'nojh'armfulefle'efil Still another'feeture' relaitest'o the construction ofth'e 'contzgot' shoe dndits mount ing whereby. proper contzifct vvithi the easing terminals is 'ensuredl' For a more. coin 'ilete understanding of this invention, together wi th further objects, advantageous details and combinations of parts, reference maybe harl to the accom- 95 ranying drawings"lllustrntingcertain emorliments'there0f,"i n which Figure, l'is' an outere'nd elevation of the l l ifi i. -L

Fi re 2 'isfe' cross sect'o of F igurel.

Figure '3 is a. cr0 ss sectidn on linew33 of F i gii'rfef 1, weenie? sh ftland contact shoe being" shown in dotted alin'eii. toindicete their relativepositions."

casing, the actuating er l ieing, remo ved and the conth pt'shoe a nd ls' pathof move- --shaft;

Figure 6 is a. side elevntlorrof the same.

Figure 7 is an end view' opposite direction t1:- Fignz'e 5. Y

Figure 8 is a section oh line- 8+8 of Figure 5. y

Figure 9 is an end elewition qf a. shoe and its carrier plate or v 'n' gs lwwi ng 2r modified construction.

, engine eyl inders',;;,each,, contact,- hcomprising Figure lisg'qn' inner end elevationof the 1921. mm n.

FigureslO and-11 aresections on lines 1010 fend 1 1-11 respeetivel -,of Figure 9. Referring. 1 no1 e .partieular y to Figures 1 to 1, at 1. is indigated a ca ,oomposeduof insulatingmateriahsuch as. akelite. This cap or casing has, en ;out vva rd-ly: extending sleeve portion, 2'hevi nga dishediend-3 for the reception-pf the usualHcapqi-etaining means found in Fordlcars The sleeve 2 merges into a eirenlardisc rtion 4 hav-ing a marginalgl aterally:extnifiiig-flange 5. In order tofdetejmin'egthe timing the member 1 is monntegllsq gas-to he rockedslightlyjin the usualg llnenner l F01"; the purposeof rockin -th1s ca 'SC TB-nkiermG having 4 laterall y} exten i ng'- ;-,portion,-. 7 for engage; o5

ment vwith the timerfloontrol rod is, provided.

This arm Bis fixedgo the-easing 1 by means of rivets, as shownhtS, each, rivet eomprising an enlarged-hase portion 9, which-j-is molded in the casing The'routen endiof each rivet is hollowto forrnwavthin circular wall 10, which maybe insertedvin asuitable perforation m the garrn 6 end bent-over the outer faceofthewarm to hold it securely; in position. Asgs hown inFigure-Z this 76 arm is fixed -in positionlwithin-n.slot. .11 in :1 lug 12 extending,oiitwardlyffrom the fece The eap lcnrries contaets leading; to the so a button lfi havingle lgnurled outer face so that it may be retained projecting: through; the dise portiongl by moldingiit therein... The inner,,fa ce 16 of e eeh button is fiush'with the innerjacejof the disc portionv, and projecting jrornihits roppkwi oiaeeis a. threaded ortion 317, on i which may screwed the-rijinrlingjgiutvlti for; attaching the wire leading.

Ad acent eachbutton resyxzeti vet ,cylinglo words to indie-ate. the wirel- -.(;onncetions to have. a certain amount of end play, and in order torprovide for proper contact at all times the shoe is mounted on the. shaft in the following manner. Referring to Figures 3,5, 6 and 7 at 21 is shownv af sleeve fitting over the end of the'shait 20 and having near one end thereof a slot 22 engageable with a key or pin 23 fixed to the shaft. By this means the sleeve is prevented from rotation relative to the shaft. The other end ofthissleeveis providedwith a pair of laterally projecting ears-24 having a pair of alined perforations therein; for the reception of a pintle pin 25h Outwardly of the lugs 24, the. forked ends of'a thin vane or plate 26 are journaled on the intle pin 25, this vaneor plate carr ing' tie; contact shoe, as will be describe Surrounding the. pintle pin 25 betweenthe lugs, 24 are a pair of coil springs 27, one. end of each spring .bearin against oneface of the vane .26 at,28, an the othere'end -at 29 being passed. throughm. perforation 30-ina lug 3 1 extending outwardl' from the sleeve 21 andpositioned oentra y adjace'ntthe ends of the lugs 24;. :These springsserve to urg'e the plate into-the position shownin Figure 6 so,tha't=thes hoe 32-. carried thereby may be pressed ZlDtO'gQODtBCl; with Ltheinner face of the disc portion. 40f the-casing to contact serially with the buttons 15. a

, flnprdr-to retain the. shoe 32,1-the plate 26 is .perforated at 33to allowthe shoe 32 to pass freely therein 'One end of this shoe has a laterally extending flange: 34, formin ahead suiliciently long to extend or brldgeover the ends of the perforation 33 so that. the shoe-may not pass entirelytherethrough. In order to retain-theflshoe in position in the perforation, the plate 26 has cutandstruck up or offset therefrom a re tainin" flange or arm 35,,which has a small tit. 36 formed thereon and projecting toivard theflangedend of the shoe-32. These parts are so' proportioned as to allow considerable. looseplay of the'shoe32 so-that it ma properly engage the disc poitionv t; and a low it limited ,universal, movement relative to,the plate 26.;

1In-operat1on, the inner faceof' the shoe" bears against the inner 'face of the disc por-' tion 4or the flush ends .16 of the button'srl5,

. rotation of the shaft12O presses the shoe? againstthe ed e of the perforation 1n the the shoe being pressc tl backwardly against the tit which forms a'ubstantially point contacttherewith. ,Moving-of the shoe by the plate, which. t us gives a substantial line contactfthere vith, this contact being sufli-E ciently narrow to effectually squeeze out any dirt which might get in between the shoe and the plate, so that a good contact is al- Wa s ensured.

l n Figures 9 to 11, a slightly modified mounting of the shoe is shown, in which the .curved outer faces 41- ofth'e shoe 32'.

BEST AVAlLABLE COPE "carrying plate I 26, is formed with downwardly'extended flange rtions 40 shaped substantially as the sur ace of a. sphere to form a substantial ball contact with the construction allov 'vs the universal movement of the shoe without substantial loose play, but the construction first described is believed preferablebecause of the line con- This tact between the shoe and the holding plate, 7&5

which ensures a good electrical contact. In this modified construction also, a retainin arm or flange 35 struck from the niateri of the plate'26' "and 'havin a tit 36 thereon is employed'to hold tion in the plate 26". I Having thus "described certain embodiments of this inve'ntiomit should be evident to those skilled-in the art that many changes e shoe in posiand modifications might be .made therein without departing from its 8 iritor scope as defined by the appended o aims. 'Iclaimi 1' 1. An electrical contact element com rising a shoe, a thin plate having'a perioration to receive said shoe, and means for retaining said 'shoe loosely in said perforw' tion to contact with the edge of said plate within said perforation;

2. An electrical contact element compris ing an unattached shoe,"a plate having a. perforation to receive saidshoeloos ely, and a retaining flan e 'cut and bent from said pflatc'and exten ing over one face of said 5 0e. I I I v 'V l 1 I I 3. An electrical contact element comprising .an unattached sho e having a laterally extending flange atone end thereof, a plate haviug=a perfor tion'to receive said shoe, the flange thereon bridging said perforaw tion', and a" flange cut and bent from said plate extending over the flanged end of said shoe-to retain said shoeloo'sely inpositio'm 4. An electrical contact element oompris ios ingan'unattachcd shoe having a laterally 1-1.0

froin -the' flanged ends 111.5

ing an unattached shoe having a laterally extending fian e atfone end thereof, a plate having a perforation for loosely receivin said shoe, the flange thereon brid ngsai perforation, a'flange cut and bent rom said plate and projecting over the flanged end of said shoe, and a tit on said flange against which said shoe may contact.

6. In a timer, a rotary timing shaft, a thin plate carried by said shaft and having an opening therethrough and an offset flange projecting partly over said opening,

and a headed contact member loosely seated in said opening, the flange overlying the 'head thereof and said head bridging said opening. a

l 7. In a timer, a rotary timing shaft, a thin plate carried by said shaft and having an opening therethrough and an offset,

r flange projecting partly over said opening,

SESTAVNLABLE COPE said flange having a tit projecting toward. said opening, and a headed contact member 1 loosely seated in said opening, the flange overlying the head thereof and said head bridging said opening.

In testimony whereof I have aflixed my signature.

HANS H. WANDERS. 

